'Institute of Electrical and Electronics Engineers (IEEE)'
Doi
Abstract
This paper presents a novel concept of
unidirectional bridgeless combined boost-buck converter for
electric vehicles (EVs) battery chargers. The proposed converter
is composed by two power stages: an ac-dc front-end converter
used to interface the power grid and the dc-link, and a dc-dc
back-end converter used to interface the dc-link and the
batteries. The ac-dc converter is a bridgeless boost-type
converter and the dc-dc converter is an interleaved buck-type
converter. The proposed converter operates with sinusoidal grid
current and unitary power factor for all operating power levels.
Along the paper is described in detail the proposed converter for
EV battery chargers: the circuit topology, the different stages
describing the principle of operation, the power control theory,
and the current control strategy, for both converters. Along the
paper are presented several simulation results for a maximum
power of 3.5 kW.Fundação para a Ciência e Tecnologia (FCT
